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#1
09-09-2009, 04:09 PM
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87 300e euro failed emissions/ smog test. What to do?
I went to the local e-check today, and was really disappointed...
HC: @2500rpm limit: 220 Reading: 286.4 fail CO: @2500rpm limit: 1.20 Reading: 7.88 fail CO2: @2500rpm 6.38. (no limit) HC: @idle limit: 220 Reading: 449.0 fail CO: @idle limit: 1.20 Reading: 5.10 fail CO2: @idle 4.07 Gas cap: PASS!!!  The car was at operating temp, I just filled up with 92, plus a bottle of octane booster. Im burning through gas like I got a hole in my tank.. Im guessing about 200 miles to 16 gallons (12-13mpg) The O2 sensor was put on after the fact. Part of the fed process I guess. The car is originally from Belgium.. Where do I start?
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Eugene 10 E63 AMG 93 300te 4matic 07 BMW X3 14 Ford F-150 Fx2 
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#2
09-09-2009, 06:53 PM
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O2 sensor working?
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Allen Kroliczek Oak Grove Autosport | Oak Grove Autosport 01 G500, 82 300TD, quite a few more.....
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#3
09-10-2009, 12:43 AM
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IIRC a bad O2 sensor will cause your MPG to drop drastically. Your CO readings seem to point to a non, or poorly functioning sensor. How old is the sensor, how many miles? There are a couple very knowledgeable emissions folks around here who can give a better diagnosis of your emissions readings.
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Mike Tangas '73 280SEL 4.5 (9/72)- RIP  Only 8,173 units built from 5/71 thru 11/72 '02 CLK320 Cabriolet - wifey's mid-life crisis 2012 VW Jetta Sportwagon TDI...at least its a diesel Non illegitemae carborundum.
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#4
09-10-2009, 10:40 AM
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187k on the clock.
How would I test the o2 sensor? hot or cold? what reading would I get if good or bad?
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Eugene 10 E63 AMG 93 300te 4matic 07 BMW X3 14 Ford F-150 Fx2
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#5
09-10-2009, 10:47 PM
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Just for ducks,you may want to make sure that your OVP relay is working......
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